| //===-- AArch64ELFObjectWriter.cpp - AArch64 ELF Writer -------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file handles ELF-specific object emission, converting LLVM's internal |
| // fixups into the appropriate relocations. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "MCTargetDesc/AArch64FixupKinds.h" |
| #include "MCTargetDesc/AArch64MCTargetDesc.h" |
| #include "llvm/MC/MCELFObjectWriter.h" |
| #include "llvm/MC/MCValue.h" |
| #include "llvm/Support/ErrorHandling.h" |
| |
| using namespace llvm; |
| |
| namespace { |
| class AArch64ELFObjectWriter : public MCELFObjectTargetWriter { |
| public: |
| AArch64ELFObjectWriter(uint8_t OSABI); |
| |
| virtual ~AArch64ELFObjectWriter(); |
| |
| protected: |
| virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup, |
| bool IsPCRel, bool IsRelocWithSymbol, |
| int64_t Addend) const; |
| private: |
| }; |
| } |
| |
| AArch64ELFObjectWriter::AArch64ELFObjectWriter(uint8_t OSABI) |
| : MCELFObjectTargetWriter(/*Is64Bit*/ true, OSABI, ELF::EM_AARCH64, |
| /*HasRelocationAddend*/ true) |
| {} |
| |
| AArch64ELFObjectWriter::~AArch64ELFObjectWriter() |
| {} |
| |
| unsigned AArch64ELFObjectWriter::GetRelocType(const MCValue &Target, |
| const MCFixup &Fixup, |
| bool IsPCRel, |
| bool IsRelocWithSymbol, |
| int64_t Addend) const { |
| unsigned Type; |
| if (IsPCRel) { |
| switch ((unsigned)Fixup.getKind()) { |
| default: |
| llvm_unreachable("Unimplemented fixup -> relocation"); |
| case FK_Data_8: |
| return ELF::R_AARCH64_PREL64; |
| case FK_Data_4: |
| return ELF::R_AARCH64_PREL32; |
| case FK_Data_2: |
| return ELF::R_AARCH64_PREL16; |
| case AArch64::fixup_a64_ld_prel: |
| Type = ELF::R_AARCH64_LD_PREL_LO19; |
| break; |
| case AArch64::fixup_a64_adr_prel: |
| Type = ELF::R_AARCH64_ADR_PREL_LO21; |
| break; |
| case AArch64::fixup_a64_adr_prel_page: |
| Type = ELF::R_AARCH64_ADR_PREL_PG_HI21; |
| break; |
| case AArch64::fixup_a64_adr_prel_got_page: |
| Type = ELF::R_AARCH64_ADR_GOT_PAGE; |
| break; |
| case AArch64::fixup_a64_tstbr: |
| Type = ELF::R_AARCH64_TSTBR14; |
| break; |
| case AArch64::fixup_a64_condbr: |
| Type = ELF::R_AARCH64_CONDBR19; |
| break; |
| case AArch64::fixup_a64_uncondbr: |
| Type = ELF::R_AARCH64_JUMP26; |
| break; |
| case AArch64::fixup_a64_call: |
| Type = ELF::R_AARCH64_CALL26; |
| break; |
| case AArch64::fixup_a64_adr_gottprel_page: |
| Type = ELF::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21; |
| break; |
| case AArch64::fixup_a64_ld_gottprel_prel19: |
| Type = ELF::R_AARCH64_TLSIE_LD_GOTTPREL_PREL19; |
| break; |
| case AArch64::fixup_a64_tlsdesc_adr_page: |
| Type = ELF::R_AARCH64_TLSDESC_ADR_PAGE; |
| break; |
| } |
| } else { |
| switch ((unsigned)Fixup.getKind()) { |
| default: |
| llvm_unreachable("Unimplemented fixup -> relocation"); |
| case FK_Data_8: |
| return ELF::R_AARCH64_ABS64; |
| case FK_Data_4: |
| return ELF::R_AARCH64_ABS32; |
| case FK_Data_2: |
| return ELF::R_AARCH64_ABS16; |
| case AArch64::fixup_a64_add_lo12: |
| Type = ELF::R_AARCH64_ADD_ABS_LO12_NC; |
| break; |
| case AArch64::fixup_a64_ld64_got_lo12_nc: |
| Type = ELF::R_AARCH64_LD64_GOT_LO12_NC; |
| break; |
| case AArch64::fixup_a64_ldst8_lo12: |
| Type = ELF::R_AARCH64_LDST8_ABS_LO12_NC; |
| break; |
| case AArch64::fixup_a64_ldst16_lo12: |
| Type = ELF::R_AARCH64_LDST16_ABS_LO12_NC; |
| break; |
| case AArch64::fixup_a64_ldst32_lo12: |
| Type = ELF::R_AARCH64_LDST32_ABS_LO12_NC; |
| break; |
| case AArch64::fixup_a64_ldst64_lo12: |
| Type = ELF::R_AARCH64_LDST64_ABS_LO12_NC; |
| break; |
| case AArch64::fixup_a64_ldst128_lo12: |
| Type = ELF::R_AARCH64_LDST128_ABS_LO12_NC; |
| break; |
| case AArch64::fixup_a64_movw_uabs_g0: |
| Type = ELF::R_AARCH64_MOVW_UABS_G0; |
| break; |
| case AArch64::fixup_a64_movw_uabs_g0_nc: |
| Type = ELF::R_AARCH64_MOVW_UABS_G0_NC; |
| break; |
| case AArch64::fixup_a64_movw_uabs_g1: |
| Type = ELF::R_AARCH64_MOVW_UABS_G1; |
| break; |
| case AArch64::fixup_a64_movw_uabs_g1_nc: |
| Type = ELF::R_AARCH64_MOVW_UABS_G1_NC; |
| break; |
| case AArch64::fixup_a64_movw_uabs_g2: |
| Type = ELF::R_AARCH64_MOVW_UABS_G2; |
| break; |
| case AArch64::fixup_a64_movw_uabs_g2_nc: |
| Type = ELF::R_AARCH64_MOVW_UABS_G2_NC; |
| break; |
| case AArch64::fixup_a64_movw_uabs_g3: |
| Type = ELF::R_AARCH64_MOVW_UABS_G3; |
| break; |
| case AArch64::fixup_a64_movw_sabs_g0: |
| Type = ELF::R_AARCH64_MOVW_SABS_G0; |
| break; |
| case AArch64::fixup_a64_movw_sabs_g1: |
| Type = ELF::R_AARCH64_MOVW_SABS_G1; |
| break; |
| case AArch64::fixup_a64_movw_sabs_g2: |
| Type = ELF::R_AARCH64_MOVW_SABS_G2; |
| break; |
| |
| // TLS Local-dynamic block |
| case AArch64::fixup_a64_movw_dtprel_g2: |
| Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G2; |
| break; |
| case AArch64::fixup_a64_movw_dtprel_g1: |
| Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G1; |
| break; |
| case AArch64::fixup_a64_movw_dtprel_g1_nc: |
| Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G1_NC; |
| break; |
| case AArch64::fixup_a64_movw_dtprel_g0: |
| Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G0; |
| break; |
| case AArch64::fixup_a64_movw_dtprel_g0_nc: |
| Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC; |
| break; |
| case AArch64::fixup_a64_add_dtprel_hi12: |
| Type = ELF::R_AARCH64_TLSLD_ADD_DTPREL_HI12; |
| break; |
| case AArch64::fixup_a64_add_dtprel_lo12: |
| Type = ELF::R_AARCH64_TLSLD_ADD_DTPREL_LO12; |
| break; |
| case AArch64::fixup_a64_add_dtprel_lo12_nc: |
| Type = ELF::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC; |
| break; |
| case AArch64::fixup_a64_ldst8_dtprel_lo12: |
| Type = ELF::R_AARCH64_TLSLD_LDST8_DTPREL_LO12; |
| break; |
| case AArch64::fixup_a64_ldst8_dtprel_lo12_nc: |
| Type = ELF::R_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC; |
| break; |
| case AArch64::fixup_a64_ldst16_dtprel_lo12: |
| Type = ELF::R_AARCH64_TLSLD_LDST16_DTPREL_LO12; |
| break; |
| case AArch64::fixup_a64_ldst16_dtprel_lo12_nc: |
| Type = ELF::R_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC; |
| break; |
| case AArch64::fixup_a64_ldst32_dtprel_lo12: |
| Type = ELF::R_AARCH64_TLSLD_LDST32_DTPREL_LO12; |
| break; |
| case AArch64::fixup_a64_ldst32_dtprel_lo12_nc: |
| Type = ELF::R_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC; |
| break; |
| case AArch64::fixup_a64_ldst64_dtprel_lo12: |
| Type = ELF::R_AARCH64_TLSLD_LDST64_DTPREL_LO12; |
| break; |
| case AArch64::fixup_a64_ldst64_dtprel_lo12_nc: |
| Type = ELF::R_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC; |
| break; |
| |
| // TLS initial-exec block |
| case AArch64::fixup_a64_movw_gottprel_g1: |
| Type = ELF::R_AARCH64_TLSIE_MOVW_GOTTPREL_G1; |
| break; |
| case AArch64::fixup_a64_movw_gottprel_g0_nc: |
| Type = ELF::R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC; |
| break; |
| case AArch64::fixup_a64_ld64_gottprel_lo12_nc: |
| Type = ELF::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC; |
| break; |
| |
| // TLS local-exec block |
| case AArch64::fixup_a64_movw_tprel_g2: |
| Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G2; |
| break; |
| case AArch64::fixup_a64_movw_tprel_g1: |
| Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G1; |
| break; |
| case AArch64::fixup_a64_movw_tprel_g1_nc: |
| Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G1_NC; |
| break; |
| case AArch64::fixup_a64_movw_tprel_g0: |
| Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G0; |
| break; |
| case AArch64::fixup_a64_movw_tprel_g0_nc: |
| Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G0_NC; |
| break; |
| case AArch64::fixup_a64_add_tprel_hi12: |
| Type = ELF::R_AARCH64_TLSLE_ADD_TPREL_HI12; |
| break; |
| case AArch64::fixup_a64_add_tprel_lo12: |
| Type = ELF::R_AARCH64_TLSLE_ADD_TPREL_LO12; |
| break; |
| case AArch64::fixup_a64_add_tprel_lo12_nc: |
| Type = ELF::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC; |
| break; |
| case AArch64::fixup_a64_ldst8_tprel_lo12: |
| Type = ELF::R_AARCH64_TLSLE_LDST8_TPREL_LO12; |
| break; |
| case AArch64::fixup_a64_ldst8_tprel_lo12_nc: |
| Type = ELF::R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC; |
| break; |
| case AArch64::fixup_a64_ldst16_tprel_lo12: |
| Type = ELF::R_AARCH64_TLSLE_LDST16_TPREL_LO12; |
| break; |
| case AArch64::fixup_a64_ldst16_tprel_lo12_nc: |
| Type = ELF::R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC; |
| break; |
| case AArch64::fixup_a64_ldst32_tprel_lo12: |
| Type = ELF::R_AARCH64_TLSLE_LDST32_TPREL_LO12; |
| break; |
| case AArch64::fixup_a64_ldst32_tprel_lo12_nc: |
| Type = ELF::R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC; |
| break; |
| case AArch64::fixup_a64_ldst64_tprel_lo12: |
| Type = ELF::R_AARCH64_TLSLE_LDST64_TPREL_LO12; |
| break; |
| case AArch64::fixup_a64_ldst64_tprel_lo12_nc: |
| Type = ELF::R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC; |
| break; |
| |
| // TLS general-dynamic block |
| case AArch64::fixup_a64_tlsdesc_adr_page: |
| Type = ELF::R_AARCH64_TLSDESC_ADR_PAGE; |
| break; |
| case AArch64::fixup_a64_tlsdesc_ld64_lo12_nc: |
| Type = ELF::R_AARCH64_TLSDESC_LD64_LO12_NC; |
| break; |
| case AArch64::fixup_a64_tlsdesc_add_lo12_nc: |
| Type = ELF::R_AARCH64_TLSDESC_ADD_LO12_NC; |
| break; |
| case AArch64::fixup_a64_tlsdesc_call: |
| Type = ELF::R_AARCH64_TLSDESC_CALL; |
| break; |
| } |
| } |
| |
| return Type; |
| } |
| |
| MCObjectWriter *llvm::createAArch64ELFObjectWriter(raw_ostream &OS, |
| uint8_t OSABI) { |
| MCELFObjectTargetWriter *MOTW = new AArch64ELFObjectWriter(OSABI); |
| return createELFObjectWriter(MOTW, OS, /*IsLittleEndian=*/true); |
| } |
